World time: Patek Philippe and Louis Cottier

Patek Philippe's World Time collection sees three new faces

Patek Philippe 5930P-001 WORLD TIME FLYBACK CHRONOGRAPH

Time Travelers: The Patek Philippe World Time Watches - THE COLLECTIVE

Patek Philippe World Time: dive into the complete history

Patek Philippe World Time: dive into the complete history

Patek Philippe World Time: dive into the complete history

The History of The Patek Philippe World Time Watches

The History of the World as told by World Time Watches

Auctions: Patek Philippe To Auction Off Unique 5131J World Timer With View Of Geneva For Charity - Hodinkee

Introducing the Patek Philippe 5935A-001 World Time Flyback Chronograph

Comparative review - 3 Modern Worldtimer Watches from Vacheron Constantin, Jaeger-LeCoultre and Montblanc - Monochrome Watches

The world timer complication was invented in the 1930s by Louis Cottier; a complication for travellers that needed to know the time in a specific time

Patek Philippe World Time White Gold Ref 5110G

Patek Philippe World Time Reference 5230G, A White Gold Automatic Wristwatch Available For Immediate Sale At Sotheby's